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fb1d9738 JB |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
28 | #include "vmwgfx_drv.h" | |
760285e7 DH |
29 | #include <drm/vmwgfx_drm.h> |
30 | #include <drm/ttm/ttm_object.h> | |
31 | #include <drm/ttm/ttm_placement.h> | |
32 | #include <drm/drmP.h> | |
543831cf | 33 | #include "vmwgfx_resource_priv.h" |
fb1d9738 | 34 | |
ea029c28 TH |
35 | #define VMW_RES_EVICT_ERR_COUNT 10 |
36 | ||
fb1d9738 | 37 | struct vmw_user_dma_buffer { |
c486d4f8 | 38 | struct ttm_prime_object prime; |
fb1d9738 JB |
39 | struct vmw_dma_buffer dma; |
40 | }; | |
41 | ||
42 | struct vmw_bo_user_rep { | |
43 | uint32_t handle; | |
44 | uint64_t map_handle; | |
45 | }; | |
46 | ||
47 | struct vmw_stream { | |
48 | struct vmw_resource res; | |
49 | uint32_t stream_id; | |
50 | }; | |
51 | ||
52 | struct vmw_user_stream { | |
53 | struct ttm_base_object base; | |
54 | struct vmw_stream stream; | |
55 | }; | |
56 | ||
c0951b79 TH |
57 | |
58 | static uint64_t vmw_user_stream_size; | |
59 | ||
60 | static const struct vmw_res_func vmw_stream_func = { | |
61 | .res_type = vmw_res_stream, | |
62 | .needs_backup = false, | |
63 | .may_evict = false, | |
64 | .type_name = "video streams", | |
65 | .backup_placement = NULL, | |
66 | .create = NULL, | |
67 | .destroy = NULL, | |
68 | .bind = NULL, | |
69 | .unbind = NULL | |
70 | }; | |
71 | ||
fb1d9738 JB |
72 | static inline struct vmw_dma_buffer * |
73 | vmw_dma_buffer(struct ttm_buffer_object *bo) | |
74 | { | |
75 | return container_of(bo, struct vmw_dma_buffer, base); | |
76 | } | |
77 | ||
78 | static inline struct vmw_user_dma_buffer * | |
79 | vmw_user_dma_buffer(struct ttm_buffer_object *bo) | |
80 | { | |
81 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
82 | return container_of(vmw_bo, struct vmw_user_dma_buffer, dma); | |
83 | } | |
84 | ||
85 | struct vmw_resource *vmw_resource_reference(struct vmw_resource *res) | |
86 | { | |
87 | kref_get(&res->kref); | |
88 | return res; | |
89 | } | |
90 | ||
5bb39e81 TH |
91 | |
92 | /** | |
93 | * vmw_resource_release_id - release a resource id to the id manager. | |
94 | * | |
95 | * @res: Pointer to the resource. | |
96 | * | |
97 | * Release the resource id to the resource id manager and set it to -1 | |
98 | */ | |
543831cf | 99 | void vmw_resource_release_id(struct vmw_resource *res) |
5bb39e81 TH |
100 | { |
101 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 | 102 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
103 | |
104 | write_lock(&dev_priv->resource_lock); | |
105 | if (res->id != -1) | |
c0951b79 | 106 | idr_remove(idr, res->id); |
5bb39e81 TH |
107 | res->id = -1; |
108 | write_unlock(&dev_priv->resource_lock); | |
109 | } | |
110 | ||
fb1d9738 JB |
111 | static void vmw_resource_release(struct kref *kref) |
112 | { | |
113 | struct vmw_resource *res = | |
114 | container_of(kref, struct vmw_resource, kref); | |
115 | struct vmw_private *dev_priv = res->dev_priv; | |
c0951b79 TH |
116 | int id; |
117 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; | |
fb1d9738 | 118 | |
5bb39e81 | 119 | res->avail = false; |
c0951b79 | 120 | list_del_init(&res->lru_head); |
fb1d9738 | 121 | write_unlock(&dev_priv->resource_lock); |
c0951b79 TH |
122 | if (res->backup) { |
123 | struct ttm_buffer_object *bo = &res->backup->base; | |
124 | ||
125 | ttm_bo_reserve(bo, false, false, false, 0); | |
126 | if (!list_empty(&res->mob_head) && | |
127 | res->func->unbind != NULL) { | |
128 | struct ttm_validate_buffer val_buf; | |
129 | ||
130 | val_buf.bo = bo; | |
131 | res->func->unbind(res, false, &val_buf); | |
132 | } | |
133 | res->backup_dirty = false; | |
134 | list_del_init(&res->mob_head); | |
135 | ttm_bo_unreserve(bo); | |
136 | vmw_dmabuf_unreference(&res->backup); | |
137 | } | |
fb1d9738 JB |
138 | |
139 | if (likely(res->hw_destroy != NULL)) | |
140 | res->hw_destroy(res); | |
141 | ||
c0951b79 | 142 | id = res->id; |
fb1d9738 JB |
143 | if (res->res_free != NULL) |
144 | res->res_free(res); | |
145 | else | |
146 | kfree(res); | |
147 | ||
148 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 TH |
149 | |
150 | if (id != -1) | |
151 | idr_remove(idr, id); | |
fb1d9738 JB |
152 | } |
153 | ||
154 | void vmw_resource_unreference(struct vmw_resource **p_res) | |
155 | { | |
156 | struct vmw_resource *res = *p_res; | |
157 | struct vmw_private *dev_priv = res->dev_priv; | |
158 | ||
159 | *p_res = NULL; | |
160 | write_lock(&dev_priv->resource_lock); | |
161 | kref_put(&res->kref, vmw_resource_release); | |
162 | write_unlock(&dev_priv->resource_lock); | |
163 | } | |
164 | ||
5bb39e81 TH |
165 | |
166 | /** | |
167 | * vmw_resource_alloc_id - release a resource id to the id manager. | |
168 | * | |
5bb39e81 TH |
169 | * @res: Pointer to the resource. |
170 | * | |
171 | * Allocate the lowest free resource from the resource manager, and set | |
172 | * @res->id to that id. Returns 0 on success and -ENOMEM on failure. | |
173 | */ | |
543831cf | 174 | int vmw_resource_alloc_id(struct vmw_resource *res) |
5bb39e81 | 175 | { |
c0951b79 | 176 | struct vmw_private *dev_priv = res->dev_priv; |
5bb39e81 | 177 | int ret; |
c0951b79 | 178 | struct idr *idr = &dev_priv->res_idr[res->func->res_type]; |
5bb39e81 TH |
179 | |
180 | BUG_ON(res->id != -1); | |
181 | ||
cc39a8fa TH |
182 | idr_preload(GFP_KERNEL); |
183 | write_lock(&dev_priv->resource_lock); | |
5bb39e81 | 184 | |
cc39a8fa TH |
185 | ret = idr_alloc(idr, res, 1, 0, GFP_NOWAIT); |
186 | if (ret >= 0) | |
187 | res->id = ret; | |
5bb39e81 | 188 | |
cc39a8fa TH |
189 | write_unlock(&dev_priv->resource_lock); |
190 | idr_preload_end(); | |
191 | return ret < 0 ? ret : 0; | |
5bb39e81 TH |
192 | } |
193 | ||
c0951b79 TH |
194 | /** |
195 | * vmw_resource_init - initialize a struct vmw_resource | |
196 | * | |
197 | * @dev_priv: Pointer to a device private struct. | |
198 | * @res: The struct vmw_resource to initialize. | |
199 | * @obj_type: Resource object type. | |
200 | * @delay_id: Boolean whether to defer device id allocation until | |
201 | * the first validation. | |
202 | * @res_free: Resource destructor. | |
203 | * @func: Resource function table. | |
204 | */ | |
543831cf TH |
205 | int vmw_resource_init(struct vmw_private *dev_priv, struct vmw_resource *res, |
206 | bool delay_id, | |
207 | void (*res_free) (struct vmw_resource *res), | |
208 | const struct vmw_res_func *func) | |
fb1d9738 | 209 | { |
fb1d9738 JB |
210 | kref_init(&res->kref); |
211 | res->hw_destroy = NULL; | |
212 | res->res_free = res_free; | |
fb1d9738 JB |
213 | res->avail = false; |
214 | res->dev_priv = dev_priv; | |
c0951b79 TH |
215 | res->func = func; |
216 | INIT_LIST_HEAD(&res->lru_head); | |
217 | INIT_LIST_HEAD(&res->mob_head); | |
173fb7d4 | 218 | INIT_LIST_HEAD(&res->binding_head); |
5bb39e81 | 219 | res->id = -1; |
c0951b79 TH |
220 | res->backup = NULL; |
221 | res->backup_offset = 0; | |
222 | res->backup_dirty = false; | |
223 | res->res_dirty = false; | |
5bb39e81 TH |
224 | if (delay_id) |
225 | return 0; | |
226 | else | |
c0951b79 | 227 | return vmw_resource_alloc_id(res); |
fb1d9738 JB |
228 | } |
229 | ||
230 | /** | |
231 | * vmw_resource_activate | |
232 | * | |
233 | * @res: Pointer to the newly created resource | |
234 | * @hw_destroy: Destroy function. NULL if none. | |
235 | * | |
236 | * Activate a resource after the hardware has been made aware of it. | |
237 | * Set tye destroy function to @destroy. Typically this frees the | |
238 | * resource and destroys the hardware resources associated with it. | |
239 | * Activate basically means that the function vmw_resource_lookup will | |
240 | * find it. | |
241 | */ | |
543831cf TH |
242 | void vmw_resource_activate(struct vmw_resource *res, |
243 | void (*hw_destroy) (struct vmw_resource *)) | |
fb1d9738 JB |
244 | { |
245 | struct vmw_private *dev_priv = res->dev_priv; | |
246 | ||
247 | write_lock(&dev_priv->resource_lock); | |
248 | res->avail = true; | |
249 | res->hw_destroy = hw_destroy; | |
250 | write_unlock(&dev_priv->resource_lock); | |
251 | } | |
252 | ||
253 | struct vmw_resource *vmw_resource_lookup(struct vmw_private *dev_priv, | |
254 | struct idr *idr, int id) | |
255 | { | |
256 | struct vmw_resource *res; | |
257 | ||
258 | read_lock(&dev_priv->resource_lock); | |
259 | res = idr_find(idr, id); | |
260 | if (res && res->avail) | |
261 | kref_get(&res->kref); | |
262 | else | |
263 | res = NULL; | |
264 | read_unlock(&dev_priv->resource_lock); | |
265 | ||
266 | if (unlikely(res == NULL)) | |
267 | return NULL; | |
268 | ||
269 | return res; | |
270 | } | |
271 | ||
c0951b79 TH |
272 | /** |
273 | * vmw_user_resource_lookup_handle - lookup a struct resource from a | |
274 | * TTM user-space handle and perform basic type checks | |
275 | * | |
276 | * @dev_priv: Pointer to a device private struct | |
277 | * @tfile: Pointer to a struct ttm_object_file identifying the caller | |
278 | * @handle: The TTM user-space handle | |
279 | * @converter: Pointer to an object describing the resource type | |
280 | * @p_res: On successful return the location pointed to will contain | |
281 | * a pointer to a refcounted struct vmw_resource. | |
282 | * | |
283 | * If the handle can't be found or is associated with an incorrect resource | |
284 | * type, -EINVAL will be returned. | |
285 | */ | |
286 | int vmw_user_resource_lookup_handle(struct vmw_private *dev_priv, | |
287 | struct ttm_object_file *tfile, | |
288 | uint32_t handle, | |
289 | const struct vmw_user_resource_conv | |
290 | *converter, | |
291 | struct vmw_resource **p_res) | |
fb1d9738 | 292 | { |
7a73ba74 | 293 | struct ttm_base_object *base; |
c0951b79 TH |
294 | struct vmw_resource *res; |
295 | int ret = -EINVAL; | |
fb1d9738 | 296 | |
7a73ba74 TH |
297 | base = ttm_base_object_lookup(tfile, handle); |
298 | if (unlikely(base == NULL)) | |
299 | return -EINVAL; | |
300 | ||
79e5f810 | 301 | if (unlikely(ttm_base_object_type(base) != converter->object_type)) |
c0951b79 | 302 | goto out_bad_resource; |
7a73ba74 | 303 | |
c0951b79 | 304 | res = converter->base_obj_to_res(base); |
7a73ba74 | 305 | |
c0951b79 TH |
306 | read_lock(&dev_priv->resource_lock); |
307 | if (!res->avail || res->res_free != converter->res_free) { | |
308 | read_unlock(&dev_priv->resource_lock); | |
309 | goto out_bad_resource; | |
310 | } | |
fb1d9738 | 311 | |
c0951b79 TH |
312 | kref_get(&res->kref); |
313 | read_unlock(&dev_priv->resource_lock); | |
314 | ||
315 | *p_res = res; | |
316 | ret = 0; | |
317 | ||
318 | out_bad_resource: | |
7a73ba74 | 319 | ttm_base_object_unref(&base); |
c0951b79 TH |
320 | |
321 | return ret; | |
322 | } | |
323 | ||
324 | /** | |
325 | * Helper function that looks either a surface or dmabuf. | |
326 | * | |
327 | * The pointer this pointed at by out_surf and out_buf needs to be null. | |
328 | */ | |
329 | int vmw_user_lookup_handle(struct vmw_private *dev_priv, | |
330 | struct ttm_object_file *tfile, | |
331 | uint32_t handle, | |
332 | struct vmw_surface **out_surf, | |
333 | struct vmw_dma_buffer **out_buf) | |
334 | { | |
335 | struct vmw_resource *res; | |
336 | int ret; | |
337 | ||
338 | BUG_ON(*out_surf || *out_buf); | |
339 | ||
340 | ret = vmw_user_resource_lookup_handle(dev_priv, tfile, handle, | |
341 | user_surface_converter, | |
342 | &res); | |
343 | if (!ret) { | |
344 | *out_surf = vmw_res_to_srf(res); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | *out_surf = NULL; | |
349 | ret = vmw_user_dmabuf_lookup(tfile, handle, out_buf); | |
fb1d9738 JB |
350 | return ret; |
351 | } | |
352 | ||
353 | /** | |
354 | * Buffer management. | |
355 | */ | |
308d17ef TH |
356 | |
357 | /** | |
358 | * vmw_dmabuf_acc_size - Calculate the pinned memory usage of buffers | |
359 | * | |
360 | * @dev_priv: Pointer to a struct vmw_private identifying the device. | |
361 | * @size: The requested buffer size. | |
362 | * @user: Whether this is an ordinary dma buffer or a user dma buffer. | |
363 | */ | |
364 | static size_t vmw_dmabuf_acc_size(struct vmw_private *dev_priv, size_t size, | |
365 | bool user) | |
366 | { | |
367 | static size_t struct_size, user_struct_size; | |
368 | size_t num_pages = PAGE_ALIGN(size) >> PAGE_SHIFT; | |
369 | size_t page_array_size = ttm_round_pot(num_pages * sizeof(void *)); | |
370 | ||
371 | if (unlikely(struct_size == 0)) { | |
372 | size_t backend_size = ttm_round_pot(vmw_tt_size); | |
373 | ||
374 | struct_size = backend_size + | |
375 | ttm_round_pot(sizeof(struct vmw_dma_buffer)); | |
376 | user_struct_size = backend_size + | |
377 | ttm_round_pot(sizeof(struct vmw_user_dma_buffer)); | |
378 | } | |
379 | ||
380 | if (dev_priv->map_mode == vmw_dma_alloc_coherent) | |
381 | page_array_size += | |
382 | ttm_round_pot(num_pages * sizeof(dma_addr_t)); | |
383 | ||
384 | return ((user) ? user_struct_size : struct_size) + | |
385 | page_array_size; | |
386 | } | |
387 | ||
effe1105 TH |
388 | void vmw_dmabuf_bo_free(struct ttm_buffer_object *bo) |
389 | { | |
390 | struct vmw_dma_buffer *vmw_bo = vmw_dma_buffer(bo); | |
effe1105 | 391 | |
fb1d9738 JB |
392 | kfree(vmw_bo); |
393 | } | |
394 | ||
308d17ef TH |
395 | static void vmw_user_dmabuf_destroy(struct ttm_buffer_object *bo) |
396 | { | |
397 | struct vmw_user_dma_buffer *vmw_user_bo = vmw_user_dma_buffer(bo); | |
398 | ||
399 | ttm_prime_object_kfree(vmw_user_bo, prime); | |
400 | } | |
401 | ||
fb1d9738 JB |
402 | int vmw_dmabuf_init(struct vmw_private *dev_priv, |
403 | struct vmw_dma_buffer *vmw_bo, | |
404 | size_t size, struct ttm_placement *placement, | |
405 | bool interruptible, | |
406 | void (*bo_free) (struct ttm_buffer_object *bo)) | |
407 | { | |
408 | struct ttm_bo_device *bdev = &dev_priv->bdev; | |
fb1d9738 JB |
409 | size_t acc_size; |
410 | int ret; | |
308d17ef | 411 | bool user = (bo_free == &vmw_user_dmabuf_destroy); |
fb1d9738 | 412 | |
308d17ef | 413 | BUG_ON(!bo_free && (!user && (bo_free != vmw_dmabuf_bo_free))); |
fb1d9738 | 414 | |
308d17ef | 415 | acc_size = vmw_dmabuf_acc_size(dev_priv, size, user); |
fb1d9738 JB |
416 | memset(vmw_bo, 0, sizeof(*vmw_bo)); |
417 | ||
c0951b79 | 418 | INIT_LIST_HEAD(&vmw_bo->res_list); |
fb1d9738 JB |
419 | |
420 | ret = ttm_bo_init(bdev, &vmw_bo->base, size, | |
308d17ef TH |
421 | (user) ? ttm_bo_type_device : |
422 | ttm_bo_type_kernel, placement, | |
0b91c4a1 | 423 | 0, interruptible, |
129b78bf | 424 | NULL, acc_size, NULL, bo_free); |
fb1d9738 JB |
425 | return ret; |
426 | } | |
427 | ||
fb1d9738 JB |
428 | static void vmw_user_dmabuf_release(struct ttm_base_object **p_base) |
429 | { | |
430 | struct vmw_user_dma_buffer *vmw_user_bo; | |
431 | struct ttm_base_object *base = *p_base; | |
432 | struct ttm_buffer_object *bo; | |
433 | ||
434 | *p_base = NULL; | |
435 | ||
436 | if (unlikely(base == NULL)) | |
437 | return; | |
438 | ||
c486d4f8 TH |
439 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
440 | prime.base); | |
fb1d9738 JB |
441 | bo = &vmw_user_bo->dma.base; |
442 | ttm_bo_unref(&bo); | |
443 | } | |
444 | ||
1d7a5cbf TH |
445 | static void vmw_user_dmabuf_ref_obj_release(struct ttm_base_object *base, |
446 | enum ttm_ref_type ref_type) | |
447 | { | |
448 | struct vmw_user_dma_buffer *user_bo; | |
449 | user_bo = container_of(base, struct vmw_user_dma_buffer, prime.base); | |
450 | ||
451 | switch (ref_type) { | |
452 | case TTM_REF_SYNCCPU_WRITE: | |
453 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
454 | break; | |
455 | default: | |
456 | BUG(); | |
457 | } | |
458 | } | |
459 | ||
c0951b79 TH |
460 | /** |
461 | * vmw_user_dmabuf_alloc - Allocate a user dma buffer | |
462 | * | |
463 | * @dev_priv: Pointer to a struct device private. | |
464 | * @tfile: Pointer to a struct ttm_object_file on which to register the user | |
465 | * object. | |
466 | * @size: Size of the dma buffer. | |
467 | * @shareable: Boolean whether the buffer is shareable with other open files. | |
468 | * @handle: Pointer to where the handle value should be assigned. | |
469 | * @p_dma_buf: Pointer to where the refcounted struct vmw_dma_buffer pointer | |
470 | * should be assigned. | |
471 | */ | |
472 | int vmw_user_dmabuf_alloc(struct vmw_private *dev_priv, | |
473 | struct ttm_object_file *tfile, | |
474 | uint32_t size, | |
475 | bool shareable, | |
476 | uint32_t *handle, | |
477 | struct vmw_dma_buffer **p_dma_buf) | |
478 | { | |
479 | struct vmw_user_dma_buffer *user_bo; | |
480 | struct ttm_buffer_object *tmp; | |
481 | int ret; | |
482 | ||
483 | user_bo = kzalloc(sizeof(*user_bo), GFP_KERNEL); | |
484 | if (unlikely(user_bo == NULL)) { | |
485 | DRM_ERROR("Failed to allocate a buffer.\n"); | |
486 | return -ENOMEM; | |
487 | } | |
488 | ||
489 | ret = vmw_dmabuf_init(dev_priv, &user_bo->dma, size, | |
96c5f0df TH |
490 | (dev_priv->has_mob) ? |
491 | &vmw_sys_placement : | |
c0951b79 TH |
492 | &vmw_vram_sys_placement, true, |
493 | &vmw_user_dmabuf_destroy); | |
494 | if (unlikely(ret != 0)) | |
495 | return ret; | |
496 | ||
497 | tmp = ttm_bo_reference(&user_bo->dma.base); | |
c486d4f8 TH |
498 | ret = ttm_prime_object_init(tfile, |
499 | size, | |
500 | &user_bo->prime, | |
501 | shareable, | |
502 | ttm_buffer_type, | |
1d7a5cbf TH |
503 | &vmw_user_dmabuf_release, |
504 | &vmw_user_dmabuf_ref_obj_release); | |
c0951b79 TH |
505 | if (unlikely(ret != 0)) { |
506 | ttm_bo_unref(&tmp); | |
507 | goto out_no_base_object; | |
508 | } | |
509 | ||
510 | *p_dma_buf = &user_bo->dma; | |
c486d4f8 | 511 | *handle = user_bo->prime.base.hash.key; |
c0951b79 TH |
512 | |
513 | out_no_base_object: | |
514 | return ret; | |
515 | } | |
516 | ||
d08a9b9c TH |
517 | /** |
518 | * vmw_user_dmabuf_verify_access - verify access permissions on this | |
519 | * buffer object. | |
520 | * | |
521 | * @bo: Pointer to the buffer object being accessed | |
522 | * @tfile: Identifying the caller. | |
523 | */ | |
524 | int vmw_user_dmabuf_verify_access(struct ttm_buffer_object *bo, | |
525 | struct ttm_object_file *tfile) | |
526 | { | |
527 | struct vmw_user_dma_buffer *vmw_user_bo; | |
528 | ||
529 | if (unlikely(bo->destroy != vmw_user_dmabuf_destroy)) | |
530 | return -EPERM; | |
531 | ||
532 | vmw_user_bo = vmw_user_dma_buffer(bo); | |
c486d4f8 TH |
533 | return (vmw_user_bo->prime.base.tfile == tfile || |
534 | vmw_user_bo->prime.base.shareable) ? 0 : -EPERM; | |
d08a9b9c TH |
535 | } |
536 | ||
1d7a5cbf TH |
537 | /** |
538 | * vmw_user_dmabuf_synccpu_grab - Grab a struct vmw_user_dma_buffer for cpu | |
539 | * access, idling previous GPU operations on the buffer and optionally | |
540 | * blocking it for further command submissions. | |
541 | * | |
542 | * @user_bo: Pointer to the buffer object being grabbed for CPU access | |
543 | * @tfile: Identifying the caller. | |
544 | * @flags: Flags indicating how the grab should be performed. | |
545 | * | |
546 | * A blocking grab will be automatically released when @tfile is closed. | |
547 | */ | |
548 | static int vmw_user_dmabuf_synccpu_grab(struct vmw_user_dma_buffer *user_bo, | |
549 | struct ttm_object_file *tfile, | |
550 | uint32_t flags) | |
551 | { | |
552 | struct ttm_buffer_object *bo = &user_bo->dma.base; | |
553 | bool existed; | |
554 | int ret; | |
555 | ||
556 | if (flags & drm_vmw_synccpu_allow_cs) { | |
557 | struct ttm_bo_device *bdev = bo->bdev; | |
558 | ||
559 | spin_lock(&bdev->fence_lock); | |
560 | ret = ttm_bo_wait(bo, false, true, | |
561 | !!(flags & drm_vmw_synccpu_dontblock)); | |
562 | spin_unlock(&bdev->fence_lock); | |
563 | return ret; | |
564 | } | |
565 | ||
566 | ret = ttm_bo_synccpu_write_grab | |
567 | (bo, !!(flags & drm_vmw_synccpu_dontblock)); | |
568 | if (unlikely(ret != 0)) | |
569 | return ret; | |
570 | ||
571 | ret = ttm_ref_object_add(tfile, &user_bo->prime.base, | |
572 | TTM_REF_SYNCCPU_WRITE, &existed); | |
573 | if (ret != 0 || existed) | |
574 | ttm_bo_synccpu_write_release(&user_bo->dma.base); | |
575 | ||
576 | return ret; | |
577 | } | |
578 | ||
579 | /** | |
580 | * vmw_user_dmabuf_synccpu_release - Release a previous grab for CPU access, | |
581 | * and unblock command submission on the buffer if blocked. | |
582 | * | |
583 | * @handle: Handle identifying the buffer object. | |
584 | * @tfile: Identifying the caller. | |
585 | * @flags: Flags indicating the type of release. | |
586 | */ | |
587 | static int vmw_user_dmabuf_synccpu_release(uint32_t handle, | |
588 | struct ttm_object_file *tfile, | |
589 | uint32_t flags) | |
590 | { | |
591 | if (!(flags & drm_vmw_synccpu_allow_cs)) | |
592 | return ttm_ref_object_base_unref(tfile, handle, | |
593 | TTM_REF_SYNCCPU_WRITE); | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | /** | |
599 | * vmw_user_dmabuf_synccpu_release - ioctl function implementing the synccpu | |
600 | * functionality. | |
601 | * | |
602 | * @dev: Identifies the drm device. | |
603 | * @data: Pointer to the ioctl argument. | |
604 | * @file_priv: Identifies the caller. | |
605 | * | |
606 | * This function checks the ioctl arguments for validity and calls the | |
607 | * relevant synccpu functions. | |
608 | */ | |
609 | int vmw_user_dmabuf_synccpu_ioctl(struct drm_device *dev, void *data, | |
610 | struct drm_file *file_priv) | |
611 | { | |
612 | struct drm_vmw_synccpu_arg *arg = | |
613 | (struct drm_vmw_synccpu_arg *) data; | |
614 | struct vmw_dma_buffer *dma_buf; | |
615 | struct vmw_user_dma_buffer *user_bo; | |
616 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
617 | int ret; | |
618 | ||
619 | if ((arg->flags & (drm_vmw_synccpu_read | drm_vmw_synccpu_write)) == 0 | |
620 | || (arg->flags & ~(drm_vmw_synccpu_read | drm_vmw_synccpu_write | | |
621 | drm_vmw_synccpu_dontblock | | |
622 | drm_vmw_synccpu_allow_cs)) != 0) { | |
623 | DRM_ERROR("Illegal synccpu flags.\n"); | |
624 | return -EINVAL; | |
625 | } | |
626 | ||
627 | switch (arg->op) { | |
628 | case drm_vmw_synccpu_grab: | |
629 | ret = vmw_user_dmabuf_lookup(tfile, arg->handle, &dma_buf); | |
630 | if (unlikely(ret != 0)) | |
631 | return ret; | |
632 | ||
633 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, | |
634 | dma); | |
635 | ret = vmw_user_dmabuf_synccpu_grab(user_bo, tfile, arg->flags); | |
636 | vmw_dmabuf_unreference(&dma_buf); | |
637 | if (unlikely(ret != 0 && ret != -ERESTARTSYS && | |
638 | ret != -EBUSY)) { | |
639 | DRM_ERROR("Failed synccpu grab on handle 0x%08x.\n", | |
640 | (unsigned int) arg->handle); | |
641 | return ret; | |
642 | } | |
643 | break; | |
644 | case drm_vmw_synccpu_release: | |
645 | ret = vmw_user_dmabuf_synccpu_release(arg->handle, tfile, | |
646 | arg->flags); | |
647 | if (unlikely(ret != 0)) { | |
648 | DRM_ERROR("Failed synccpu release on handle 0x%08x.\n", | |
649 | (unsigned int) arg->handle); | |
650 | return ret; | |
651 | } | |
652 | break; | |
653 | default: | |
654 | DRM_ERROR("Invalid synccpu operation.\n"); | |
655 | return -EINVAL; | |
656 | } | |
657 | ||
658 | return 0; | |
659 | } | |
660 | ||
fb1d9738 JB |
661 | int vmw_dmabuf_alloc_ioctl(struct drm_device *dev, void *data, |
662 | struct drm_file *file_priv) | |
663 | { | |
664 | struct vmw_private *dev_priv = vmw_priv(dev); | |
665 | union drm_vmw_alloc_dmabuf_arg *arg = | |
666 | (union drm_vmw_alloc_dmabuf_arg *)data; | |
667 | struct drm_vmw_alloc_dmabuf_req *req = &arg->req; | |
668 | struct drm_vmw_dmabuf_rep *rep = &arg->rep; | |
c0951b79 TH |
669 | struct vmw_dma_buffer *dma_buf; |
670 | uint32_t handle; | |
fb1d9738 JB |
671 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
672 | int ret; | |
673 | ||
fb1d9738 | 674 | ret = ttm_read_lock(&vmaster->lock, true); |
c0951b79 | 675 | if (unlikely(ret != 0)) |
fb1d9738 | 676 | return ret; |
fb1d9738 | 677 | |
c0951b79 TH |
678 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
679 | req->size, false, &handle, &dma_buf); | |
fb1d9738 | 680 | if (unlikely(ret != 0)) |
2f5993cc | 681 | goto out_no_dmabuf; |
fb1d9738 | 682 | |
c0951b79 | 683 | rep->handle = handle; |
72525b3f | 684 | rep->map_handle = drm_vma_node_offset_addr(&dma_buf->base.vma_node); |
c0951b79 TH |
685 | rep->cur_gmr_id = handle; |
686 | rep->cur_gmr_offset = 0; | |
687 | ||
688 | vmw_dmabuf_unreference(&dma_buf); | |
fb1d9738 | 689 | |
2f5993cc | 690 | out_no_dmabuf: |
fb1d9738 JB |
691 | ttm_read_unlock(&vmaster->lock); |
692 | ||
2f5993cc | 693 | return ret; |
fb1d9738 JB |
694 | } |
695 | ||
696 | int vmw_dmabuf_unref_ioctl(struct drm_device *dev, void *data, | |
697 | struct drm_file *file_priv) | |
698 | { | |
699 | struct drm_vmw_unref_dmabuf_arg *arg = | |
700 | (struct drm_vmw_unref_dmabuf_arg *)data; | |
701 | ||
702 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
703 | arg->handle, | |
704 | TTM_REF_USAGE); | |
705 | } | |
706 | ||
fb1d9738 JB |
707 | int vmw_user_dmabuf_lookup(struct ttm_object_file *tfile, |
708 | uint32_t handle, struct vmw_dma_buffer **out) | |
709 | { | |
710 | struct vmw_user_dma_buffer *vmw_user_bo; | |
711 | struct ttm_base_object *base; | |
712 | ||
713 | base = ttm_base_object_lookup(tfile, handle); | |
714 | if (unlikely(base == NULL)) { | |
715 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
716 | (unsigned long)handle); | |
717 | return -ESRCH; | |
718 | } | |
719 | ||
c486d4f8 | 720 | if (unlikely(ttm_base_object_type(base) != ttm_buffer_type)) { |
fb1d9738 JB |
721 | ttm_base_object_unref(&base); |
722 | printk(KERN_ERR "Invalid buffer object handle 0x%08lx.\n", | |
723 | (unsigned long)handle); | |
724 | return -EINVAL; | |
725 | } | |
726 | ||
c486d4f8 TH |
727 | vmw_user_bo = container_of(base, struct vmw_user_dma_buffer, |
728 | prime.base); | |
fb1d9738 JB |
729 | (void)ttm_bo_reference(&vmw_user_bo->dma.base); |
730 | ttm_base_object_unref(&base); | |
731 | *out = &vmw_user_bo->dma; | |
732 | ||
733 | return 0; | |
734 | } | |
735 | ||
c0951b79 | 736 | int vmw_user_dmabuf_reference(struct ttm_object_file *tfile, |
a97e2192 TH |
737 | struct vmw_dma_buffer *dma_buf, |
738 | uint32_t *handle) | |
c0951b79 TH |
739 | { |
740 | struct vmw_user_dma_buffer *user_bo; | |
741 | ||
742 | if (dma_buf->base.destroy != vmw_user_dmabuf_destroy) | |
743 | return -EINVAL; | |
744 | ||
745 | user_bo = container_of(dma_buf, struct vmw_user_dma_buffer, dma); | |
a97e2192 TH |
746 | |
747 | *handle = user_bo->prime.base.hash.key; | |
c486d4f8 TH |
748 | return ttm_ref_object_add(tfile, &user_bo->prime.base, |
749 | TTM_REF_USAGE, NULL); | |
c0951b79 TH |
750 | } |
751 | ||
fb1d9738 | 752 | /* |
65155b37 | 753 | * Stream management |
fb1d9738 JB |
754 | */ |
755 | ||
756 | static void vmw_stream_destroy(struct vmw_resource *res) | |
757 | { | |
758 | struct vmw_private *dev_priv = res->dev_priv; | |
759 | struct vmw_stream *stream; | |
760 | int ret; | |
761 | ||
762 | DRM_INFO("%s: unref\n", __func__); | |
763 | stream = container_of(res, struct vmw_stream, res); | |
764 | ||
765 | ret = vmw_overlay_unref(dev_priv, stream->stream_id); | |
766 | WARN_ON(ret != 0); | |
767 | } | |
768 | ||
769 | static int vmw_stream_init(struct vmw_private *dev_priv, | |
770 | struct vmw_stream *stream, | |
771 | void (*res_free) (struct vmw_resource *res)) | |
772 | { | |
773 | struct vmw_resource *res = &stream->res; | |
774 | int ret; | |
775 | ||
c0951b79 TH |
776 | ret = vmw_resource_init(dev_priv, res, false, res_free, |
777 | &vmw_stream_func); | |
fb1d9738 JB |
778 | |
779 | if (unlikely(ret != 0)) { | |
780 | if (res_free == NULL) | |
781 | kfree(stream); | |
782 | else | |
783 | res_free(&stream->res); | |
784 | return ret; | |
785 | } | |
786 | ||
787 | ret = vmw_overlay_claim(dev_priv, &stream->stream_id); | |
788 | if (ret) { | |
789 | vmw_resource_unreference(&res); | |
790 | return ret; | |
791 | } | |
792 | ||
793 | DRM_INFO("%s: claimed\n", __func__); | |
794 | ||
795 | vmw_resource_activate(&stream->res, vmw_stream_destroy); | |
796 | return 0; | |
797 | } | |
798 | ||
fb1d9738 JB |
799 | static void vmw_user_stream_free(struct vmw_resource *res) |
800 | { | |
801 | struct vmw_user_stream *stream = | |
802 | container_of(res, struct vmw_user_stream, stream.res); | |
414ee50b | 803 | struct vmw_private *dev_priv = res->dev_priv; |
fb1d9738 | 804 | |
cdad0521 | 805 | ttm_base_object_kfree(stream, base); |
414ee50b TH |
806 | ttm_mem_global_free(vmw_mem_glob(dev_priv), |
807 | vmw_user_stream_size); | |
fb1d9738 JB |
808 | } |
809 | ||
810 | /** | |
811 | * This function is called when user space has no more references on the | |
812 | * base object. It releases the base-object's reference on the resource object. | |
813 | */ | |
814 | ||
815 | static void vmw_user_stream_base_release(struct ttm_base_object **p_base) | |
816 | { | |
817 | struct ttm_base_object *base = *p_base; | |
818 | struct vmw_user_stream *stream = | |
819 | container_of(base, struct vmw_user_stream, base); | |
820 | struct vmw_resource *res = &stream->stream.res; | |
821 | ||
822 | *p_base = NULL; | |
823 | vmw_resource_unreference(&res); | |
824 | } | |
825 | ||
826 | int vmw_stream_unref_ioctl(struct drm_device *dev, void *data, | |
827 | struct drm_file *file_priv) | |
828 | { | |
829 | struct vmw_private *dev_priv = vmw_priv(dev); | |
830 | struct vmw_resource *res; | |
831 | struct vmw_user_stream *stream; | |
832 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
833 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
c0951b79 | 834 | struct idr *idr = &dev_priv->res_idr[vmw_res_stream]; |
fb1d9738 JB |
835 | int ret = 0; |
836 | ||
c0951b79 TH |
837 | |
838 | res = vmw_resource_lookup(dev_priv, idr, arg->stream_id); | |
fb1d9738 JB |
839 | if (unlikely(res == NULL)) |
840 | return -EINVAL; | |
841 | ||
842 | if (res->res_free != &vmw_user_stream_free) { | |
843 | ret = -EINVAL; | |
844 | goto out; | |
845 | } | |
846 | ||
847 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
848 | if (stream->base.tfile != tfile) { | |
849 | ret = -EINVAL; | |
850 | goto out; | |
851 | } | |
852 | ||
853 | ttm_ref_object_base_unref(tfile, stream->base.hash.key, TTM_REF_USAGE); | |
854 | out: | |
855 | vmw_resource_unreference(&res); | |
856 | return ret; | |
857 | } | |
858 | ||
859 | int vmw_stream_claim_ioctl(struct drm_device *dev, void *data, | |
860 | struct drm_file *file_priv) | |
861 | { | |
862 | struct vmw_private *dev_priv = vmw_priv(dev); | |
414ee50b | 863 | struct vmw_user_stream *stream; |
fb1d9738 JB |
864 | struct vmw_resource *res; |
865 | struct vmw_resource *tmp; | |
866 | struct drm_vmw_stream_arg *arg = (struct drm_vmw_stream_arg *)data; | |
867 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
414ee50b | 868 | struct vmw_master *vmaster = vmw_master(file_priv->master); |
fb1d9738 JB |
869 | int ret; |
870 | ||
414ee50b TH |
871 | /* |
872 | * Approximate idr memory usage with 128 bytes. It will be limited | |
873 | * by maximum number_of streams anyway? | |
874 | */ | |
875 | ||
876 | if (unlikely(vmw_user_stream_size == 0)) | |
877 | vmw_user_stream_size = ttm_round_pot(sizeof(*stream)) + 128; | |
878 | ||
879 | ret = ttm_read_lock(&vmaster->lock, true); | |
880 | if (unlikely(ret != 0)) | |
881 | return ret; | |
882 | ||
883 | ret = ttm_mem_global_alloc(vmw_mem_glob(dev_priv), | |
884 | vmw_user_stream_size, | |
885 | false, true); | |
886 | if (unlikely(ret != 0)) { | |
887 | if (ret != -ERESTARTSYS) | |
888 | DRM_ERROR("Out of graphics memory for stream" | |
889 | " creation.\n"); | |
890 | goto out_unlock; | |
891 | } | |
892 | ||
893 | ||
894 | stream = kmalloc(sizeof(*stream), GFP_KERNEL); | |
895 | if (unlikely(stream == NULL)) { | |
896 | ttm_mem_global_free(vmw_mem_glob(dev_priv), | |
897 | vmw_user_stream_size); | |
898 | ret = -ENOMEM; | |
899 | goto out_unlock; | |
900 | } | |
fb1d9738 JB |
901 | |
902 | res = &stream->stream.res; | |
903 | stream->base.shareable = false; | |
904 | stream->base.tfile = NULL; | |
905 | ||
414ee50b TH |
906 | /* |
907 | * From here on, the destructor takes over resource freeing. | |
908 | */ | |
909 | ||
fb1d9738 JB |
910 | ret = vmw_stream_init(dev_priv, &stream->stream, vmw_user_stream_free); |
911 | if (unlikely(ret != 0)) | |
414ee50b | 912 | goto out_unlock; |
fb1d9738 JB |
913 | |
914 | tmp = vmw_resource_reference(res); | |
915 | ret = ttm_base_object_init(tfile, &stream->base, false, VMW_RES_STREAM, | |
916 | &vmw_user_stream_base_release, NULL); | |
917 | ||
918 | if (unlikely(ret != 0)) { | |
919 | vmw_resource_unreference(&tmp); | |
920 | goto out_err; | |
921 | } | |
922 | ||
923 | arg->stream_id = res->id; | |
924 | out_err: | |
925 | vmw_resource_unreference(&res); | |
414ee50b TH |
926 | out_unlock: |
927 | ttm_read_unlock(&vmaster->lock); | |
fb1d9738 JB |
928 | return ret; |
929 | } | |
930 | ||
931 | int vmw_user_stream_lookup(struct vmw_private *dev_priv, | |
932 | struct ttm_object_file *tfile, | |
933 | uint32_t *inout_id, struct vmw_resource **out) | |
934 | { | |
935 | struct vmw_user_stream *stream; | |
936 | struct vmw_resource *res; | |
937 | int ret; | |
938 | ||
c0951b79 TH |
939 | res = vmw_resource_lookup(dev_priv, &dev_priv->res_idr[vmw_res_stream], |
940 | *inout_id); | |
fb1d9738 JB |
941 | if (unlikely(res == NULL)) |
942 | return -EINVAL; | |
943 | ||
944 | if (res->res_free != &vmw_user_stream_free) { | |
945 | ret = -EINVAL; | |
946 | goto err_ref; | |
947 | } | |
948 | ||
949 | stream = container_of(res, struct vmw_user_stream, stream.res); | |
950 | if (stream->base.tfile != tfile) { | |
951 | ret = -EPERM; | |
952 | goto err_ref; | |
953 | } | |
954 | ||
955 | *inout_id = stream->stream.stream_id; | |
956 | *out = res; | |
957 | return 0; | |
958 | err_ref: | |
959 | vmw_resource_unreference(&res); | |
960 | return ret; | |
961 | } | |
5e1782d2 DA |
962 | |
963 | ||
d69d51d7 TH |
964 | /** |
965 | * vmw_dumb_create - Create a dumb kms buffer | |
966 | * | |
967 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
968 | * @dev: Pointer to the drm device. | |
969 | * @args: Pointer to a struct drm_mode_create_dumb structure | |
970 | * | |
971 | * This is a driver callback for the core drm create_dumb functionality. | |
972 | * Note that this is very similar to the vmw_dmabuf_alloc ioctl, except | |
973 | * that the arguments have a different format. | |
974 | */ | |
5e1782d2 DA |
975 | int vmw_dumb_create(struct drm_file *file_priv, |
976 | struct drm_device *dev, | |
977 | struct drm_mode_create_dumb *args) | |
978 | { | |
979 | struct vmw_private *dev_priv = vmw_priv(dev); | |
980 | struct vmw_master *vmaster = vmw_master(file_priv->master); | |
d69d51d7 | 981 | struct vmw_dma_buffer *dma_buf; |
5e1782d2 DA |
982 | int ret; |
983 | ||
984 | args->pitch = args->width * ((args->bpp + 7) / 8); | |
985 | args->size = args->pitch * args->height; | |
986 | ||
5e1782d2 | 987 | ret = ttm_read_lock(&vmaster->lock, true); |
d69d51d7 | 988 | if (unlikely(ret != 0)) |
5e1782d2 | 989 | return ret; |
5e1782d2 | 990 | |
d69d51d7 TH |
991 | ret = vmw_user_dmabuf_alloc(dev_priv, vmw_fpriv(file_priv)->tfile, |
992 | args->size, false, &args->handle, | |
993 | &dma_buf); | |
5e1782d2 | 994 | if (unlikely(ret != 0)) |
d69d51d7 | 995 | goto out_no_dmabuf; |
5e1782d2 | 996 | |
d69d51d7 | 997 | vmw_dmabuf_unreference(&dma_buf); |
5e1782d2 DA |
998 | out_no_dmabuf: |
999 | ttm_read_unlock(&vmaster->lock); | |
1000 | return ret; | |
1001 | } | |
1002 | ||
d69d51d7 TH |
1003 | /** |
1004 | * vmw_dumb_map_offset - Return the address space offset of a dumb buffer | |
1005 | * | |
1006 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
1007 | * @dev: Pointer to the drm device. | |
1008 | * @handle: Handle identifying the dumb buffer. | |
1009 | * @offset: The address space offset returned. | |
1010 | * | |
1011 | * This is a driver callback for the core drm dumb_map_offset functionality. | |
1012 | */ | |
5e1782d2 DA |
1013 | int vmw_dumb_map_offset(struct drm_file *file_priv, |
1014 | struct drm_device *dev, uint32_t handle, | |
1015 | uint64_t *offset) | |
1016 | { | |
1017 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
1018 | struct vmw_dma_buffer *out_buf; | |
1019 | int ret; | |
1020 | ||
1021 | ret = vmw_user_dmabuf_lookup(tfile, handle, &out_buf); | |
1022 | if (ret != 0) | |
1023 | return -EINVAL; | |
1024 | ||
72525b3f | 1025 | *offset = drm_vma_node_offset_addr(&out_buf->base.vma_node); |
5e1782d2 DA |
1026 | vmw_dmabuf_unreference(&out_buf); |
1027 | return 0; | |
1028 | } | |
1029 | ||
d69d51d7 TH |
1030 | /** |
1031 | * vmw_dumb_destroy - Destroy a dumb boffer | |
1032 | * | |
1033 | * @file_priv: Pointer to a struct drm_file identifying the caller. | |
1034 | * @dev: Pointer to the drm device. | |
1035 | * @handle: Handle identifying the dumb buffer. | |
1036 | * | |
1037 | * This is a driver callback for the core drm dumb_destroy functionality. | |
1038 | */ | |
5e1782d2 DA |
1039 | int vmw_dumb_destroy(struct drm_file *file_priv, |
1040 | struct drm_device *dev, | |
1041 | uint32_t handle) | |
1042 | { | |
1043 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
1044 | handle, TTM_REF_USAGE); | |
1045 | } | |
c0951b79 TH |
1046 | |
1047 | /** | |
1048 | * vmw_resource_buf_alloc - Allocate a backup buffer for a resource. | |
1049 | * | |
1050 | * @res: The resource for which to allocate a backup buffer. | |
1051 | * @interruptible: Whether any sleeps during allocation should be | |
1052 | * performed while interruptible. | |
1053 | */ | |
1054 | static int vmw_resource_buf_alloc(struct vmw_resource *res, | |
1055 | bool interruptible) | |
1056 | { | |
1057 | unsigned long size = | |
1058 | (res->backup_size + PAGE_SIZE - 1) & PAGE_MASK; | |
1059 | struct vmw_dma_buffer *backup; | |
1060 | int ret; | |
1061 | ||
1062 | if (likely(res->backup)) { | |
1063 | BUG_ON(res->backup->base.num_pages * PAGE_SIZE < size); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | backup = kzalloc(sizeof(*backup), GFP_KERNEL); | |
1068 | if (unlikely(backup == NULL)) | |
1069 | return -ENOMEM; | |
1070 | ||
1071 | ret = vmw_dmabuf_init(res->dev_priv, backup, res->backup_size, | |
1072 | res->func->backup_placement, | |
1073 | interruptible, | |
1074 | &vmw_dmabuf_bo_free); | |
1075 | if (unlikely(ret != 0)) | |
1076 | goto out_no_dmabuf; | |
1077 | ||
1078 | res->backup = backup; | |
1079 | ||
1080 | out_no_dmabuf: | |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | /** | |
1085 | * vmw_resource_do_validate - Make a resource up-to-date and visible | |
1086 | * to the device. | |
1087 | * | |
1088 | * @res: The resource to make visible to the device. | |
1089 | * @val_buf: Information about a buffer possibly | |
1090 | * containing backup data if a bind operation is needed. | |
1091 | * | |
1092 | * On hardware resource shortage, this function returns -EBUSY and | |
1093 | * should be retried once resources have been freed up. | |
1094 | */ | |
1095 | static int vmw_resource_do_validate(struct vmw_resource *res, | |
1096 | struct ttm_validate_buffer *val_buf) | |
1097 | { | |
1098 | int ret = 0; | |
1099 | const struct vmw_res_func *func = res->func; | |
1100 | ||
1101 | if (unlikely(res->id == -1)) { | |
1102 | ret = func->create(res); | |
1103 | if (unlikely(ret != 0)) | |
1104 | return ret; | |
1105 | } | |
1106 | ||
1107 | if (func->bind && | |
1108 | ((func->needs_backup && list_empty(&res->mob_head) && | |
1109 | val_buf->bo != NULL) || | |
1110 | (!func->needs_backup && val_buf->bo != NULL))) { | |
1111 | ret = func->bind(res, val_buf); | |
1112 | if (unlikely(ret != 0)) | |
1113 | goto out_bind_failed; | |
1114 | if (func->needs_backup) | |
1115 | list_add_tail(&res->mob_head, &res->backup->res_list); | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | * Only do this on write operations, and move to | |
1120 | * vmw_resource_unreserve if it can be called after | |
1121 | * backup buffers have been unreserved. Otherwise | |
1122 | * sort out locking. | |
1123 | */ | |
1124 | res->res_dirty = true; | |
1125 | ||
1126 | return 0; | |
1127 | ||
1128 | out_bind_failed: | |
1129 | func->destroy(res); | |
1130 | ||
1131 | return ret; | |
1132 | } | |
1133 | ||
1134 | /** | |
1135 | * vmw_resource_unreserve - Unreserve a resource previously reserved for | |
1136 | * command submission. | |
1137 | * | |
1138 | * @res: Pointer to the struct vmw_resource to unreserve. | |
1139 | * @new_backup: Pointer to new backup buffer if command submission | |
1140 | * switched. | |
1141 | * @new_backup_offset: New backup offset if @new_backup is !NULL. | |
1142 | * | |
1143 | * Currently unreserving a resource means putting it back on the device's | |
1144 | * resource lru list, so that it can be evicted if necessary. | |
1145 | */ | |
1146 | void vmw_resource_unreserve(struct vmw_resource *res, | |
1147 | struct vmw_dma_buffer *new_backup, | |
1148 | unsigned long new_backup_offset) | |
1149 | { | |
1150 | struct vmw_private *dev_priv = res->dev_priv; | |
1151 | ||
1152 | if (!list_empty(&res->lru_head)) | |
1153 | return; | |
1154 | ||
1155 | if (new_backup && new_backup != res->backup) { | |
1156 | ||
1157 | if (res->backup) { | |
8bd4ce56 | 1158 | lockdep_assert_held(&res->backup->base.resv->lock.base); |
c0951b79 TH |
1159 | list_del_init(&res->mob_head); |
1160 | vmw_dmabuf_unreference(&res->backup); | |
1161 | } | |
1162 | ||
1163 | res->backup = vmw_dmabuf_reference(new_backup); | |
8bd4ce56 | 1164 | lockdep_assert_held(&new_backup->base.resv->lock.base); |
c0951b79 TH |
1165 | list_add_tail(&res->mob_head, &new_backup->res_list); |
1166 | } | |
1167 | if (new_backup) | |
1168 | res->backup_offset = new_backup_offset; | |
1169 | ||
26682480 | 1170 | if (!res->func->may_evict || res->id == -1) |
c0951b79 TH |
1171 | return; |
1172 | ||
1173 | write_lock(&dev_priv->resource_lock); | |
1174 | list_add_tail(&res->lru_head, | |
1175 | &res->dev_priv->res_lru[res->func->res_type]); | |
1176 | write_unlock(&dev_priv->resource_lock); | |
1177 | } | |
1178 | ||
1179 | /** | |
1180 | * vmw_resource_check_buffer - Check whether a backup buffer is needed | |
1181 | * for a resource and in that case, allocate | |
1182 | * one, reserve and validate it. | |
1183 | * | |
1184 | * @res: The resource for which to allocate a backup buffer. | |
1185 | * @interruptible: Whether any sleeps during allocation should be | |
1186 | * performed while interruptible. | |
1187 | * @val_buf: On successful return contains data about the | |
1188 | * reserved and validated backup buffer. | |
1189 | */ | |
ecff665f ML |
1190 | static int |
1191 | vmw_resource_check_buffer(struct vmw_resource *res, | |
ecff665f ML |
1192 | bool interruptible, |
1193 | struct ttm_validate_buffer *val_buf) | |
c0951b79 TH |
1194 | { |
1195 | struct list_head val_list; | |
1196 | bool backup_dirty = false; | |
1197 | int ret; | |
1198 | ||
1199 | if (unlikely(res->backup == NULL)) { | |
1200 | ret = vmw_resource_buf_alloc(res, interruptible); | |
1201 | if (unlikely(ret != 0)) | |
1202 | return ret; | |
1203 | } | |
1204 | ||
1205 | INIT_LIST_HEAD(&val_list); | |
1206 | val_buf->bo = ttm_bo_reference(&res->backup->base); | |
1207 | list_add_tail(&val_buf->head, &val_list); | |
ac49251b | 1208 | ret = ttm_eu_reserve_buffers(NULL, &val_list); |
c0951b79 TH |
1209 | if (unlikely(ret != 0)) |
1210 | goto out_no_reserve; | |
1211 | ||
1212 | if (res->func->needs_backup && list_empty(&res->mob_head)) | |
1213 | return 0; | |
1214 | ||
1215 | backup_dirty = res->backup_dirty; | |
1216 | ret = ttm_bo_validate(&res->backup->base, | |
1217 | res->func->backup_placement, | |
97a875cb | 1218 | true, false); |
c0951b79 TH |
1219 | |
1220 | if (unlikely(ret != 0)) | |
1221 | goto out_no_validate; | |
1222 | ||
1223 | return 0; | |
1224 | ||
1225 | out_no_validate: | |
ac49251b | 1226 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1227 | out_no_reserve: |
1228 | ttm_bo_unref(&val_buf->bo); | |
1229 | if (backup_dirty) | |
1230 | vmw_dmabuf_unreference(&res->backup); | |
1231 | ||
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | /** | |
1236 | * vmw_resource_reserve - Reserve a resource for command submission | |
1237 | * | |
1238 | * @res: The resource to reserve. | |
1239 | * | |
1240 | * This function takes the resource off the LRU list and make sure | |
1241 | * a backup buffer is present for guest-backed resources. However, | |
1242 | * the buffer may not be bound to the resource at this point. | |
1243 | * | |
1244 | */ | |
1245 | int vmw_resource_reserve(struct vmw_resource *res, bool no_backup) | |
1246 | { | |
1247 | struct vmw_private *dev_priv = res->dev_priv; | |
1248 | int ret; | |
1249 | ||
1250 | write_lock(&dev_priv->resource_lock); | |
1251 | list_del_init(&res->lru_head); | |
1252 | write_unlock(&dev_priv->resource_lock); | |
1253 | ||
1254 | if (res->func->needs_backup && res->backup == NULL && | |
1255 | !no_backup) { | |
1256 | ret = vmw_resource_buf_alloc(res, true); | |
1257 | if (unlikely(ret != 0)) | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | /** | |
1265 | * vmw_resource_backoff_reservation - Unreserve and unreference a | |
1266 | * backup buffer | |
1267 | *. | |
1268 | * @val_buf: Backup buffer information. | |
1269 | */ | |
ecff665f | 1270 | static void |
ac49251b | 1271 | vmw_resource_backoff_reservation(struct ttm_validate_buffer *val_buf) |
c0951b79 TH |
1272 | { |
1273 | struct list_head val_list; | |
1274 | ||
1275 | if (likely(val_buf->bo == NULL)) | |
1276 | return; | |
1277 | ||
1278 | INIT_LIST_HEAD(&val_list); | |
1279 | list_add_tail(&val_buf->head, &val_list); | |
ac49251b | 1280 | ttm_eu_backoff_reservation(NULL, &val_list); |
c0951b79 TH |
1281 | ttm_bo_unref(&val_buf->bo); |
1282 | } | |
1283 | ||
1284 | /** | |
1285 | * vmw_resource_do_evict - Evict a resource, and transfer its data | |
1286 | * to a backup buffer. | |
1287 | * | |
1288 | * @res: The resource to evict. | |
ea029c28 | 1289 | * @interruptible: Whether to wait interruptible. |
c0951b79 | 1290 | */ |
ea029c28 | 1291 | int vmw_resource_do_evict(struct vmw_resource *res, bool interruptible) |
c0951b79 TH |
1292 | { |
1293 | struct ttm_validate_buffer val_buf; | |
1294 | const struct vmw_res_func *func = res->func; | |
1295 | int ret; | |
1296 | ||
1297 | BUG_ON(!func->may_evict); | |
1298 | ||
1299 | val_buf.bo = NULL; | |
ac49251b | 1300 | ret = vmw_resource_check_buffer(res, interruptible, &val_buf); |
c0951b79 TH |
1301 | if (unlikely(ret != 0)) |
1302 | return ret; | |
1303 | ||
1304 | if (unlikely(func->unbind != NULL && | |
1305 | (!func->needs_backup || !list_empty(&res->mob_head)))) { | |
1306 | ret = func->unbind(res, res->res_dirty, &val_buf); | |
1307 | if (unlikely(ret != 0)) | |
1308 | goto out_no_unbind; | |
1309 | list_del_init(&res->mob_head); | |
1310 | } | |
1311 | ret = func->destroy(res); | |
1312 | res->backup_dirty = true; | |
1313 | res->res_dirty = false; | |
1314 | out_no_unbind: | |
ac49251b | 1315 | vmw_resource_backoff_reservation(&val_buf); |
c0951b79 TH |
1316 | |
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | ||
1321 | /** | |
1322 | * vmw_resource_validate - Make a resource up-to-date and visible | |
1323 | * to the device. | |
1324 | * | |
1325 | * @res: The resource to make visible to the device. | |
1326 | * | |
1327 | * On succesful return, any backup DMA buffer pointed to by @res->backup will | |
1328 | * be reserved and validated. | |
1329 | * On hardware resource shortage, this function will repeatedly evict | |
1330 | * resources of the same type until the validation succeeds. | |
1331 | */ | |
1332 | int vmw_resource_validate(struct vmw_resource *res) | |
1333 | { | |
1334 | int ret; | |
1335 | struct vmw_resource *evict_res; | |
1336 | struct vmw_private *dev_priv = res->dev_priv; | |
1337 | struct list_head *lru_list = &dev_priv->res_lru[res->func->res_type]; | |
1338 | struct ttm_validate_buffer val_buf; | |
ea029c28 | 1339 | unsigned err_count = 0; |
c0951b79 TH |
1340 | |
1341 | if (likely(!res->func->may_evict)) | |
1342 | return 0; | |
1343 | ||
1344 | val_buf.bo = NULL; | |
1345 | if (res->backup) | |
1346 | val_buf.bo = &res->backup->base; | |
1347 | do { | |
1348 | ret = vmw_resource_do_validate(res, &val_buf); | |
1349 | if (likely(ret != -EBUSY)) | |
1350 | break; | |
1351 | ||
1352 | write_lock(&dev_priv->resource_lock); | |
1353 | if (list_empty(lru_list) || !res->func->may_evict) { | |
ea029c28 | 1354 | DRM_ERROR("Out of device device resources " |
c0951b79 TH |
1355 | "for %s.\n", res->func->type_name); |
1356 | ret = -EBUSY; | |
1357 | write_unlock(&dev_priv->resource_lock); | |
1358 | break; | |
1359 | } | |
1360 | ||
1361 | evict_res = vmw_resource_reference | |
1362 | (list_first_entry(lru_list, struct vmw_resource, | |
1363 | lru_head)); | |
1364 | list_del_init(&evict_res->lru_head); | |
1365 | ||
1366 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1367 | |
1368 | ret = vmw_resource_do_evict(evict_res, true); | |
1369 | if (unlikely(ret != 0)) { | |
1370 | write_lock(&dev_priv->resource_lock); | |
1371 | list_add_tail(&evict_res->lru_head, lru_list); | |
1372 | write_unlock(&dev_priv->resource_lock); | |
1373 | if (ret == -ERESTARTSYS || | |
1374 | ++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1375 | vmw_resource_unreference(&evict_res); | |
1376 | goto out_no_validate; | |
1377 | } | |
1378 | } | |
1379 | ||
c0951b79 TH |
1380 | vmw_resource_unreference(&evict_res); |
1381 | } while (1); | |
1382 | ||
1383 | if (unlikely(ret != 0)) | |
1384 | goto out_no_validate; | |
1385 | else if (!res->func->needs_backup && res->backup) { | |
1386 | list_del_init(&res->mob_head); | |
1387 | vmw_dmabuf_unreference(&res->backup); | |
1388 | } | |
1389 | ||
1390 | return 0; | |
1391 | ||
1392 | out_no_validate: | |
1393 | return ret; | |
1394 | } | |
1395 | ||
1396 | /** | |
1397 | * vmw_fence_single_bo - Utility function to fence a single TTM buffer | |
1398 | * object without unreserving it. | |
1399 | * | |
1400 | * @bo: Pointer to the struct ttm_buffer_object to fence. | |
1401 | * @fence: Pointer to the fence. If NULL, this function will | |
1402 | * insert a fence into the command stream.. | |
1403 | * | |
1404 | * Contrary to the ttm_eu version of this function, it takes only | |
1405 | * a single buffer object instead of a list, and it also doesn't | |
1406 | * unreserve the buffer object, which needs to be done separately. | |
1407 | */ | |
1408 | void vmw_fence_single_bo(struct ttm_buffer_object *bo, | |
1409 | struct vmw_fence_obj *fence) | |
1410 | { | |
1411 | struct ttm_bo_device *bdev = bo->bdev; | |
1412 | struct ttm_bo_driver *driver = bdev->driver; | |
1413 | struct vmw_fence_obj *old_fence_obj; | |
1414 | struct vmw_private *dev_priv = | |
1415 | container_of(bdev, struct vmw_private, bdev); | |
1416 | ||
1417 | if (fence == NULL) | |
1418 | vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL); | |
1419 | else | |
1420 | driver->sync_obj_ref(fence); | |
1421 | ||
1422 | spin_lock(&bdev->fence_lock); | |
1423 | ||
1424 | old_fence_obj = bo->sync_obj; | |
1425 | bo->sync_obj = fence; | |
1426 | ||
1427 | spin_unlock(&bdev->fence_lock); | |
1428 | ||
1429 | if (old_fence_obj) | |
1430 | vmw_fence_obj_unreference(&old_fence_obj); | |
1431 | } | |
1432 | ||
1433 | /** | |
1434 | * vmw_resource_move_notify - TTM move_notify_callback | |
1435 | * | |
1436 | * @bo: The TTM buffer object about to move. | |
1437 | * @mem: The truct ttm_mem_reg indicating to what memory | |
1438 | * region the move is taking place. | |
1439 | * | |
f468911f TH |
1440 | * Evicts the Guest Backed hardware resource if the backup |
1441 | * buffer is being moved out of MOB memory. | |
1442 | * Note that this function should not race with the resource | |
1443 | * validation code as long as it accesses only members of struct | |
1444 | * resource that remain static while bo::res is !NULL and | |
1445 | * while we have @bo reserved. struct resource::backup is *not* a | |
1446 | * static member. The resource validation code will take care | |
1447 | * to set @bo::res to NULL, while having @bo reserved when the | |
1448 | * buffer is no longer bound to the resource, so @bo:res can be | |
1449 | * used to determine whether there is a need to unbind and whether | |
1450 | * it is safe to unbind. | |
c0951b79 TH |
1451 | */ |
1452 | void vmw_resource_move_notify(struct ttm_buffer_object *bo, | |
1453 | struct ttm_mem_reg *mem) | |
1454 | { | |
f468911f TH |
1455 | struct vmw_dma_buffer *dma_buf; |
1456 | ||
1457 | if (mem == NULL) | |
1458 | return; | |
1459 | ||
1460 | if (bo->destroy != vmw_dmabuf_bo_free && | |
1461 | bo->destroy != vmw_user_dmabuf_destroy) | |
1462 | return; | |
1463 | ||
1464 | dma_buf = container_of(bo, struct vmw_dma_buffer, base); | |
1465 | ||
1466 | if (mem->mem_type != VMW_PL_MOB) { | |
1467 | struct vmw_resource *res, *n; | |
1468 | struct ttm_bo_device *bdev = bo->bdev; | |
1469 | struct ttm_validate_buffer val_buf; | |
1470 | ||
1471 | val_buf.bo = bo; | |
1472 | ||
1473 | list_for_each_entry_safe(res, n, &dma_buf->res_list, mob_head) { | |
1474 | ||
1475 | if (unlikely(res->func->unbind == NULL)) | |
1476 | continue; | |
1477 | ||
1478 | (void) res->func->unbind(res, true, &val_buf); | |
1479 | res->backup_dirty = true; | |
1480 | res->res_dirty = false; | |
1481 | list_del_init(&res->mob_head); | |
1482 | } | |
1483 | ||
1484 | spin_lock(&bdev->fence_lock); | |
1485 | (void) ttm_bo_wait(bo, false, false, false); | |
1486 | spin_unlock(&bdev->fence_lock); | |
1487 | } | |
c0951b79 TH |
1488 | } |
1489 | ||
1490 | /** | |
1491 | * vmw_resource_needs_backup - Return whether a resource needs a backup buffer. | |
1492 | * | |
1493 | * @res: The resource being queried. | |
1494 | */ | |
1495 | bool vmw_resource_needs_backup(const struct vmw_resource *res) | |
1496 | { | |
1497 | return res->func->needs_backup; | |
1498 | } | |
1499 | ||
1500 | /** | |
1501 | * vmw_resource_evict_type - Evict all resources of a specific type | |
1502 | * | |
1503 | * @dev_priv: Pointer to a device private struct | |
1504 | * @type: The resource type to evict | |
1505 | * | |
1506 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
ea029c28 | 1507 | * try to evict all evictable resources of a specific type. |
c0951b79 TH |
1508 | */ |
1509 | static void vmw_resource_evict_type(struct vmw_private *dev_priv, | |
1510 | enum vmw_res_type type) | |
1511 | { | |
1512 | struct list_head *lru_list = &dev_priv->res_lru[type]; | |
1513 | struct vmw_resource *evict_res; | |
ea029c28 TH |
1514 | unsigned err_count = 0; |
1515 | int ret; | |
c0951b79 TH |
1516 | |
1517 | do { | |
1518 | write_lock(&dev_priv->resource_lock); | |
1519 | ||
1520 | if (list_empty(lru_list)) | |
1521 | goto out_unlock; | |
1522 | ||
1523 | evict_res = vmw_resource_reference( | |
1524 | list_first_entry(lru_list, struct vmw_resource, | |
1525 | lru_head)); | |
1526 | list_del_init(&evict_res->lru_head); | |
1527 | write_unlock(&dev_priv->resource_lock); | |
ea029c28 TH |
1528 | |
1529 | ret = vmw_resource_do_evict(evict_res, false); | |
1530 | if (unlikely(ret != 0)) { | |
1531 | write_lock(&dev_priv->resource_lock); | |
1532 | list_add_tail(&evict_res->lru_head, lru_list); | |
1533 | write_unlock(&dev_priv->resource_lock); | |
1534 | if (++err_count > VMW_RES_EVICT_ERR_COUNT) { | |
1535 | vmw_resource_unreference(&evict_res); | |
1536 | return; | |
1537 | } | |
1538 | } | |
1539 | ||
c0951b79 TH |
1540 | vmw_resource_unreference(&evict_res); |
1541 | } while (1); | |
1542 | ||
1543 | out_unlock: | |
1544 | write_unlock(&dev_priv->resource_lock); | |
1545 | } | |
1546 | ||
1547 | /** | |
1548 | * vmw_resource_evict_all - Evict all evictable resources | |
1549 | * | |
1550 | * @dev_priv: Pointer to a device private struct | |
1551 | * | |
1552 | * To avoid thrashing starvation or as part of the hibernation sequence, | |
1553 | * evict all evictable resources. In particular this means that all | |
1554 | * guest-backed resources that are registered with the device are | |
1555 | * evicted and the OTable becomes clean. | |
1556 | */ | |
1557 | void vmw_resource_evict_all(struct vmw_private *dev_priv) | |
1558 | { | |
1559 | enum vmw_res_type type; | |
1560 | ||
1561 | mutex_lock(&dev_priv->cmdbuf_mutex); | |
1562 | ||
1563 | for (type = 0; type < vmw_res_max; ++type) | |
1564 | vmw_resource_evict_type(dev_priv, type); | |
1565 | ||
1566 | mutex_unlock(&dev_priv->cmdbuf_mutex); | |
1567 | } |